Ogunsalu

*109 In this case, we conclude that the vexatious litigant prefiling requirements of *726 Code of Civil Procedure 1 section 391.7 apply to a self-represented litigant, previously declared a vexatious litigant, who filed a writ of mandate proceeding in the superior court to challenge the denial of his request to continue an administrative proceeding where the vexatious litigant was the respondent in the administrative proceeding. Accordingly, the superior court correctly subjected the vexatious litigant to the prefiling requirements of section 391.7. Because subsequent events have rendered effective relief impossible, we dismiss the petition as moot. *110 FACTUAL AND PROCEDURAL BACKGROUND

The California Commission on Teacher Credentialing (Commission) notified Cornelius Oluseyi Ogunsalu that it had found probable cause to recommend the suspension of his preliminary teaching credentials for 21 days and that Ogunsalu's application for a clear credential would be granted only upon completion of the suspension. The Commission's letter notifying Ogunsalu of its adverse action recommendation informed him of options that were available to him to respond to the recommendation, one of…